# 定义函数
def describe_city(name,country = "China"):
    """
    输出城市名及所属国家
    :param name: 城市名
    :param country: 所属国家
    :return: None
    """
    print(f"{name.title()} is in {country.title()}")

# 调用函数
describe_city("shenzhen")
describe_city("newyork",country = "america")